What they should have done if the government insisted on doing this, would be to bold it off site somewhere and then kids or people who.would want to go would do so. Not force this on everyone.
What they should have done was tell her to record her speech, and then play the video during the graduation as filler. It avoids disruptive security measures. It doesn't feed Moochelle's ego, though, so her personal appearance will be pushed through anyway.
I can see a bunch of parents just skipping the graduation ceremony, and holding their own unofficial graduation party elsewhere. Let Moochelle gaze upon rows of empty seats.